Enhancing the ride comfort of the off-road vibratory roller cab by adding damper hydraulic mount

Abstract

In order to improve the vibratory roller's ride comfort, a 3-D nonlinear dynamic model of the vehicle interacting with the off-road terrain is established. A damper hydraulic mount is studied and combined with the cab's rubber mounts to simulate and evaluate the performance of the ride comfort. The weighted RMS acceleration responses of the vertical driver's seat, the cab's pitch and roll angle are chosen as objective functions. The results show that the cab's rubber mounts combined with the damper hydraulic mount are clearly improved the ride comfort under various operating conditions. Especially, with damping coefficients , = 1.8 kN.s.m-1 , the weighted RMS values of the vertical driver's seat, the cab's pitch and roll angle are greatly reduced by 27.8 %, 22.7 % and 64.3 % in condition of the vehicle traveling, and by 23.8 %, 20.0 % and 63.7 % in condition of the vehicle compacting on an elastic-plastic terrain.

Study to control the cab shaking of vibratory rollers using the horizontal auxiliary damping mount

“…To evaluate the performance of the damping parameter and installation position of the ADM for reducing vibration of the cab, especially the cab shaking, the weighted RMS accelerations of the vertical driver's seat and pitching cab angle calculated in [9,[14][15] are chosen as the objective functions as follows:…”

“…Based on the traditional rubber mount of the vibratory roller cab [1,4], the hydraulic isolation mount used for engine isolation system [6][7][8] were studied and applied for the vibratory rollers to improve the cab ride comfort [1,[9][10]. The results showed that the cab ride comfort with the hydraulic mount was better than the traditional rubber mount.…”

Performance of PID-Fuzzy control for cab isolation mounts of soil compactors

“…The numerical values of the EPS are listed in Table 2 In order to analyze the performance of cab hydraulic mounts with PID-Fuzzy control, the reduction of the maximum PSD and weighted RMS accelerations of the vertical driver's seat and pitching cab angle are calculated in [11,21] are chosen as the objective functions. The simulation results of the PSD accelerations of the driver's seat and pitching cab angle with the PID-Fuzzy control at the frequencies of the drum 28 Hz and 35 Hz under the EPS with the low and high-densities are shown in Figs.…”

“…Based on the actual structure of the soil compactor, a nonlinear dynamic model of a single drum vibratory roller with 7DOF is built to evaluate the control performance of the PID-Fuzzy control for cab isolation system equipped with the hydraulic mount (HM) [2,6,11], as plotted in Fig. 1.…”

“…The hydraulic mounts applied for engine isolation mount [8] were controlled to decrease the engine vibrations [9]. Besides, some construction vehicles cab using the hydraulic mounts [10,11] were optimized and controlled to improve the ride comfort. However, the researches only concerned under the vibration excitations of the rigid road surface roughness.…”